Straight Grinding Wheel Type 1 Wheel Type Toolroom Diameter 14 In. Thickness 1-1/2 In. Arbor Size 5 In. Abrasive Material Ceramic Aluminum Oxide Bond Type Vitrified 46 Grit Grade Coarse Hardness Medium (J) Max RPM 1800 Blue For Iron High Speed Steel and Tool Steels RC 50 to 68 300 and 400 Series Stainless Steels Soft Steels RC 30 to 45 Series 5SG Specification 5SG46-JVS